<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>




<body>


    <div id="app">
        <ul v-for="set in sets">
            <li v-for="n in even(set)">{{ n }}</li>
        </ul>

    </div>



    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

    <script>



        var app = new Vue({
            el: '#app',
            data: {
                sets: [[1, 2, 3, 4, 5],[3,4,5,6,7]]
            },
            methods:{
                even:function(numbers){
                    return numbers.filter(function(number){
                        return number%2 == 0
                    })
                }
            }


        })





    </script>



</body>

</html>